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authorDan Gohman <gohman@apple.com>2009-09-26 15:09:53 +0000
committerDan Gohman <gohman@apple.com>2009-09-26 15:09:53 +0000
commit534ad04302b01566a7956e196c104e10995c141c (patch)
tree6501950bbc55e8168dcbaa00926c343b61db92ef /llvm
parent0b3cfab288471db5c32e6ea762b1b7466029a2db (diff)
downloadbcm5719-llvm-534ad04302b01566a7956e196c104e10995c141c.tar.gz
bcm5719-llvm-534ad04302b01566a7956e196c104e10995c141c.zip
Add a comment describing natural loops.
llvm-svn: 82859
Diffstat (limited to 'llvm')
-rw-r--r--llvm/include/llvm/Analysis/LoopInfo.h3
1 files changed, 2 insertions, 1 deletions
diff --git a/llvm/include/llvm/Analysis/LoopInfo.h b/llvm/include/llvm/Analysis/LoopInfo.h
index a928ccdb8ef..bed7608b11e 100644
--- a/llvm/include/llvm/Analysis/LoopInfo.h
+++ b/llvm/include/llvm/Analysis/LoopInfo.h
@@ -8,7 +8,8 @@
//===----------------------------------------------------------------------===//
//
// This file defines the LoopInfo class that is used to identify natural loops
-// and determine the loop depth of various nodes of the CFG. Note that natural
+// and determine the loop depth of various nodes of the CFG. A natural loop
+// has exactly one entry-point, which is called the header. Note that natural
// loops may actually be several loops that share the same header node.
//
// This analysis calculates the nesting structure of loops in a function. For
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